Airfoil

Details Airfoil Airfoil

1984-08-06

1986-08-19

Barefoot, Galen

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

B64C 326

Patent

active

046065199

ABSTRACT:
An airfoil having improved aerodynamic characteristics incorporates a leading edge (13) and a trailing edge (14) longitudinally displaced therefrom. A continuous lower surface (21), defining the lower camber of the airfoil, extends from the leading edge (13) to the trailing edge (14). The upper surface of the airfoil incorporates a first upper surface (22) extending rearwardly from the leading edge (13) and terminating in an offset (20), and at least a second upper surface (23) extending rearwardly therefrom. The first upper surface (22) defines a first upper camber portion of the airfoil and the second upper surface (23) defines a second upper camber portion thereof.

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patent: 1746140 (1930-02-01), Bobo
patent: 1831780 (1931-11-01), Sharp
patent: 1846328 (1932-02-01), Hampton
patent: 2959377 (1960-11-01), Kaplar
patent: 3000401 (1961-09-01), Ringleb
patent: 3010680 (1961-11-01), Kaplan
patent: 3706430 (1972-12-01), Kline et al.
patent: 4046338 (1977-09-01), Kline et al.
Morris, Scot, Fancy Flights, OMNI, Apr. 1984 at p. 64.
Nicolaides, J. D. and Ingram, C. W., "Lift and Drag Coefficients of a Semi-Wedge Airfoir", (undated).
The Paper-Plane Caper, TIME, Apr. 2, 1973 at p. 51.
DeLaurier, J. D. and Harris, J. M., "An Experimental Investigation of the Aerodynamic Characteristics of Stepped-Wedge Airfoils at Low Speeds", AIAA Paper No. 74-1015 (1974).
Lumsdaine, E., Johnson, W. S., Fletcher, L. M. and Peach, J. E., "Investigation of the Kline-Fogleman Airfoil Section for Rotor Blade Applications", Semi-Annual Report, Paper No. AE-74-1054, University of Tennessee (1974).

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